Step Index Fiber and Graded Index Fiber, Step Graded Index Fiber

STEP-INDEX OPTICAL FIBER

In Step-Index Optical Fiber, the diameter of the core is high therefore more number of modes of propagation of light can be possible. So the fiber is also called as multi mode step-index fiber cladding (110 μm) and core (10 μm).

GRADED-INDEX OPTICAL FIBER

If the core has a non-uniform refractive index that gradually decreases from the center towards the core-cladding interface, the fiber is called a Graded-Index Fiber.Graded Index Optical Fiber has Core (50 μm) and cladding (70 μm) diameter.